225122221751 has 4 divisors (see below), whose sum is σ = 257282539152. Its totient is φ = 192961904352.

The previous prime is 225122221733. The next prime is 225122221781. The reversal of 225122221751 is 157122221522.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 225122221751 - 2²² = 225118027447 is a prime.

It is a super-2 number, since 2×225122221751² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225122221781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16080158690 + ... + 16080158703.

It is an arithmetic number, because the mean of its divisors is an integer number (64320634788).

Almost surely, 2^225122221751 is an apocalyptic number.

225122221751 is a deficient number, since it is larger than the sum of its proper divisors (32160317401).

225122221751 is an equidigital number, since it uses as much as digits as its factorization.

225122221751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32160317400.

The product of its digits is 11200, while the sum is 32.

The spelling of 225122221751 in words is "two hundred twenty-five billion, one hundred twenty-two million, two hundred twenty-one thousand, seven hundred fifty-one".